JAVA HTTP 请求

标签（空格分隔）： develop-java

---

java 服务器请求http请求，详情见下

try {    System.out.println("sendKFMsg - openid = " + openId);    JSONObject  obj = new JSONObject();    obj.put("touser", openId);    // 创建url资源    URL url = new URL("https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=" + at);    // 建立http连接    HttpURLConnection conn = (HttpURLConnection) url.openConnection();    // 设置允许输出    conn.setDoOutput(true);    conn.setDoInput(true);    // 设置不用缓存    conn.setUseCaches(false);    // 设置传递方式    conn.setRequestMethod("POST");    // 设置维持长连接    conn.setRequestProperty("Connection", "Keep-Alive");    // 设置文件字符集:    conn.setRequestProperty("Charset", "UTF-8");    //转换为字节数组    byte[] data = (obj.toString()).getBytes("UTF-8");    // 设置文件长度    conn.setRequestProperty("Content-Length", String.valueOf(data.length));    // 设置文件类型:    conn.setRequestProperty("Content-type", "application/json;charset=UTF-8");    // 开始连接请求    conn.connect();    OutputStream  out = conn.getOutputStream();    // 写入请求的字符串    out.write((obj.toString()).getBytes("UTF-8"));    out.flush();    System.out.println(conn.getResponseCode());    // 请求返回的状态    if (conn.getResponseCode() == 200) {        System.out.println("连接成功");        // 请求返回的数据        InputStream in = conn.getInputStream();        String a = null;        try {            byte[] data1 = new byte[in.available()];            in.read(data1);            // 转成字符串            a = new String(data1,"UTF-8");            System.out.println(a);        } catch (Exception e1) {            e1.printStackTrace();        }    } else {        System.out.println("no++");    }} catch (Exception e) {    e.printStackTrace();} finally {    try {        if (out != null) {            out.close();        }        if (in != null) {            in.close();        }    } catch (IOException ex) {        ex.printStackTrace();    }}

请求 SOAP WebService

public String requestWebService(String uri, String namespace, String functionName, Map<String, Object> map) {    String retString = "";    OutputStream out = null;    BufferedReader in = null;    try {        String cont = "";        for (String key : map.keySet()) {            if (map.get(key).getClass().getName().equals("java.util.ArrayList")) {                String l = "";                List<String> list = (List<String>) map.get(key);                for (String single : list) {                    l += "<tem:string>" + single + "</tem:string>";                }                cont += "<tem:" + key + ">" + l + "</tem:" + key + ">";            } else if (map.get(key).getClass().getName().equals("java.lang.String")) {                cont += "<tem:" + key + ">" + map.get(key) + "</tem:" + key + ">";            }        }        System.out.println(cont);        // 传参整理        String content = "<soapenv:Envelope xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\" xmlns:tem=\"" + namespace + "\">" +                         "<soapenv:Header/>" +                         "<soapenv:Body>" +                         "<tem:" + functionName + ">" +                         cont +                         "</tem:" + functionName + ">" +                         "</soapenv:Body>" +                         "</soapenv:Envelope>"   ;        System.out.println(content);        // 创建url资源        URL url = new URL(uri);        // 建立http连接        HttpURLConnection conn = (HttpURLConnection) url.openConnection();        // 设置允许输出        conn.setDoOutput(true);        conn.setDoInput(true);        // 设置不用缓存        conn.setUseCaches(false);        // 设置传递方式        conn.setRequestMethod("POST");        // 设置维持长连接        conn.setRequestProperty("Connection", "Keep-Alive");        // 设置文件字符集:        conn.setRequestProperty("Charset", "UTF-8");        //转换为字节数组        byte[] data = (content.toString()).getBytes("UTF-8");        // 设置文件长度        conn.setRequestProperty("Content-Length", String.valueOf(data.length));        // 设置文件类型:        conn.setRequestProperty("Content-type", "text/xml;charset=UTF-8");        // 设置 SOAPAction        conn.setRequestProperty("SOAPAction", "\"" + namespace + functionName + "\"");        // 设置其他头        conn.setRequestProperty("Accept-Encoding", "gzip,deflate");        // 开始连接请求        conn.connect();        out = conn.getOutputStream();        // 写入请求的字符串        out.write((content.toString()).getBytes("UTF-8"));        out.flush();        System.out.println(conn.getResponseCode());        // 请求返回的状态        if (conn.getResponseCode() == 200) {            System.out.println("http connection successed !");            try {                // 请求返回的数据                in = new BufferedReader(new InputStreamReader(conn.getInputStream()), "UTF-8");                String line;                while ((line = in.readLine()) != null) {                    retString += line;                }                System.out.println(retString);                // 解析xml dom4j                //Document doc = null;                //doc = DocumentHelper.parseText(retString); // 将字符串转为 XML                //Element root = doc.getRootElement();                //Element returnElement = (Element)root.selectSingleNode("//SendResult");                //String returnString = returnElement.getText();                //System.out.println(returnString);                //retString = returnString;            } catch (Exception e1) {                e1.printStackTrace();            }        } else {            System.out.println("http connection failed !");        }    } catch (Exception e) {        System.out.println("error : " + e.getMessage());    } finally {        try {            if (out != null) {                out.close();            }            if (in != null) {                in.close();            }        } catch (IOException ex) {            ex.printStackTrace();        }    }}